Optical fiber laser cutting machine

Abstract

The invention discloses an optical fiber laser cutting machine which comprises a main body mechanism, a cutting mechanism, a fixing mechanism, a chip collecting mechanism, a sweeping mechanism and a displacement mechanism are arranged in the main body mechanism, the cutting mechanism, the fixing mechanism and the chip collecting mechanism are sequentially arranged from top to bottom, and the sweeping mechanism is arranged in the chip collecting mechanism; according to the device, waste chips and harmful gas can be uniformly sucked and filtered through the chip collecting mechanism, an air purification device needs to be additionally prepared, the use cost is reduced, and the situation that the waste chips remain on the hollowed-out net plate and influence the subsequent workpiece cutting operation can be avoided; through cooperative use of the sweeping mechanism and the displacement mechanism, the surface of the activated carbon filter screen and the bottom face of an inner cavity of the dust collection box can be swept, so that impurities such as sweeps can be uniformly concentrated in the material collection barrel, and the impurities such as the sweeps in the material collection barrel can be cleaned only by taking down the material collection barrel subsequently; and the labor intensity of workers can be reduced, and the scrap cleaning efficiency can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of optical fiber laser cutting machines, and in particular to an optical fiber laser cutting machine. Background Art

[0002] Fiber laser cutting machine is a laser cutting machine that uses a fiber laser generator as a light source. Fiber laser is a newly developed new type of fiber laser that outputs a high-energy-density laser beam and focuses it on the surface of the workpiece, causing the area on the workpiece irradiated by the ultra-fine focal spot to melt and vaporize instantly, and automatic cutting is achieved by moving the spot irradiation position through a CNC mechanical system. Compared with bulky gas lasers and solid-state lasers, it has obvious advantages and has gradually developed into an important candidate in the fields of high-precision laser processing, laser radar systems, space technology, laser medicine, etc.

[0003] The existing utility model patent document with announcement number CN221755031U discloses a large-format fiber laser cutting machine tool, which connects the purification and filtering unit with the interior of the closed chamber through an air intake filter tube, so that when the cutting component is processing the workpiece, as the laser gasifies or melts the material at high temperature, the gas generated will be extracted by the purification and filtering unit operating in real time through the air intake filter tube, and with the assistance of the air intake filter tube, it will be initially filtered, and then the purification and filtering unit will purify the gas to the greatest extent, and finally discharge the treated gas to the outside through the filter exhaust pipe. The use of the above structure can not only protect the health of surrounding workers during production operations, but also ensure that the processing will not cause a significant impact on the external environment, thereby improving the safety and environmental protection of the entire device. By symmetrically arranging limit assemblies on the front and rear sides of the lower end of the closed bin, the limit plate installed at the bottom can be adjusted up and down according to the length and size of the workpiece by utilizing the vertical telescopicity of the pneumatic push rod. The limit plate with an "I"-shaped structure can fix and limit workpieces of different thicknesses within the maximum range to ensure that the workpiece maintains sufficient stability during processing. The grid-structured cutting table also facilitates processing, and waste can fall directly into the aggregate pool below for subsequent cleaning.

[0004] Although the above-mentioned large-format fiber laser cutting machine can solve the corresponding technical problems, during use, since the aggregate pool is an integral structure and the machine base is large, it is difficult to clean the waste in the aggregate pool later. The waste falls into the aggregate pool only by its own gravity, which makes it difficult for the waste to fall completely into the aggregate pool, thereby affecting the subsequent cutting operation of the workpiece.

[0005] Therefore, a fiber laser cutting machine is proposed. Summary of the invention

[0006] The technical task of the present invention is to provide a fiber laser cutting machine to solve the above problems.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A fiber laser cutting machine comprises a main body, wherein a cutting mechanism, a fixing mechanism, a chip collecting mechanism, a cleaning mechanism and a displacement mechanism are arranged inside the main body, wherein the cutting mechanism, the fixing mechanism and the chip collecting mechanism are arranged in sequence from top to bottom, the cleaning mechanism is arranged inside the chip collecting mechanism, and the displacement mechanism is arranged on one side of the chip collecting mechanism;

[0009] Wherein, the main body mechanism is used to provide an installation basis for the cutting mechanism, the fixing mechanism, the chip collecting mechanism, the cleaning mechanism and the displacement mechanism;

[0010] The cutting mechanism is used to perform cutting processing on the workpiece;

[0011] The fixing mechanism is used to press and fix the workpiece;

[0012] The chip collecting mechanism is used to suck and filter the waste chips and harmful gases generated by the cutting mechanism;

[0013] The cleaning mechanism is used to clean up the waste chips accumulated inside the chip collecting mechanism;

[0014] The displacement mechanism is used to drive the cleaning mechanism to move so as to expand the cleaning range.

[0015] Preferably, the main body mechanism comprises a casing, a baffle is hingedly connected to the casing, legs for support are installed at the four corners of the bottom of the casing, the inner cavity of the casing is provided with a hollow mesh plate for carrying workpieces, the cutting mechanism and the fastener mechanism are both arranged above the hollow mesh plate, the chip collecting mechanism, the cleaning mechanism and the displacement mechanism are all arranged below the hollow mesh plate, a cavity is opened at the bottom of the inner cavity of the casing, and the hollow mesh plate is installed in the inner cavity of the cavity;

[0016] Wherein, the chip collection mechanism comprises a hopper, two of which are symmetrically installed in the inner cavity of the cavity, the bottoms of the two hoppers are commonly connected to a dust box, the rear side of the dust box is connected to an air duct, the end of the air duct away from the dust box is connected to an exhaust fan, the exhaust fan is installed through the casing, an activated carbon filter is detachably installed in the inner cavity of the dust box, an air inlet is opened at the upper part of the rear side of the casing, a dust shield is installed in the inner cavity of the air inlet, a gas flow channel is formed among the air inlet, the casing, the hopper, the dust box, the air duct and the exhaust fan, one side of the bottom of the dust box is connected to a discharge pipe, a collecting barrel is threadedly sleeved on the surface of the discharge pipe, the bottom of the collecting barrel passes through the bottom of the casing, and the displacement mechanism is arranged on a side of the dust box away from the air duct;

[0017] The cleaning mechanism includes a support assembly, which is arranged in the inner cavity of the dust box, a brush is arranged on the side of the support assembly facing the activated carbon filter, a rubber scraper is arranged on the side of the support assembly facing the bottom of the inner cavity of the dust box, a connecting assembly is arranged on the support assembly, a through groove B for the connection assembly to move is opened on the side of the dust box away from the air duct, a frame for guiding the connection assembly is slidably connected to the inner cavity of the through groove B, and the support assembly is connected to the displacement mechanism through the connecting assembly;

[0018] The support assembly includes a support plate A, the support plate A is arranged parallel to the activated carbon filter, the bottom end of the support plate A is integrally formed with a horizontally arranged support plate B, the support plate A and the support plate B are fixedly connected to an L-shaped frame, the brush is detachably connected to one side of the support plate A and contacts the surface of the activated carbon filter, and the rubber scraper is detachably connected to the bottom of the support plate B and contacts the bottom surface of the inner cavity of the dust box;

[0019] The connecting assembly includes a slider B slidably connected to the inner cavity of the frame, a side of the slider B away from the inner cavity of the dust box is fixedly connected to a bracket, the bracket is arranged on one side of the displacement mechanism, a rectangular rod is movably penetrated on the slider B, one end of the rectangular rod is fixedly connected to the L-shaped frame, a collar is slidably sleeved on the surface of the rectangular rod, a positioning column is fixedly connected to the side of the collar close to the slider B, a positioning groove adapted to the positioning column is opened on the surface of the slider B, the positioning column is inserted into the inner cavity of the corresponding positioning groove, a magnet is fixedly connected to the end of the positioning column, an iron block is fixedly connected to the inner cavity of the positioning groove, and the magnet is adsorbed on one side of the corresponding iron block;

[0020] The brush and the rubber scraper are both fixedly connected to the limit strip, and the support plate A and the support plate B are both provided with a limit groove adapted to the limit strip, and the limit strip is inserted into the inner cavity of the corresponding limit groove, and the diameter of the cross section of the limit strip is larger than the opening size of the cross section of the limit groove;

[0021] The displacement mechanism includes a support plate, which is fixedly connected to a side of the dust box away from the air duct, and the support plate is located below the through slot B. An electric telescopic rod C is installed on both sides of the top of the support plate, and a horizontally arranged rodless cylinder C is commonly installed at the output ends of the two electric telescopic rods C. The bracket is fixedly connected to the slide table of the electric telescopic rod C.

[0022] Preferably, the activated carbon filter is obliquely arranged in the inner cavity of the dust box, and a slot is provided on the side and bottom of the inner wall of the dust box, and the top and bottom of the activated carbon filter are respectively inserted into the corresponding slots.

[0023] Preferably, one end of the dust box is open, and a door is hinged on the dust box to seal and cover the open portion, one side of the door is in contact with the activated carbon filter, and a maintenance door is hinged on the lower part of one side of the casing surface and is arranged opposite to the door.

[0024] Preferably, a folding curtain C is fixedly connected to both sides of the frame, the other end of the folding curtain C is fixedly connected to the inner wall surface of the through groove B, the top and bottom of the folding curtain C are slidably connected to the inner wall surface of the through groove B, the top and bottom of the slider B are fixedly connected to the folding curtain D, the other end of the folding curtain D is fixedly connected to the inner wall surface of the frame, and both sides of the folding curtain D are slidably connected to the inner wall surface of the frame.

[0025] Preferably, opposite ends of the two limit strips are in contact, and the other end of one of the limit strips is in contact with the inner wall surface of the dust box.

[0026] Preferably, the cutting mechanism comprises a fiber laser cutter located in the inner cavity of the housing, and a positioning component A for adjusting the position of the fiber laser cutter is provided between the fiber laser cutter and the housing;

[0027] Among them, the positioning component A includes an electric telescopic rod A, the fiber laser cutter is installed at the output end of the electric telescopic rod A, a rodless cylinder A is provided on the rear side of the electric telescopic rod A, a support is fixedly connected to the slide of the rodless cylinder A, the electric telescopic rod A is installed on one side of the support, a groove is provided on both sides of the inner cavity of the casing, a rodless cylinder B is installed in the inner cavity of each groove, a slider A is fixedly connected to the slide of each rodless cylinder B, and the rodless cylinder A is installed between two sliders A.

[0028] Preferably, a folding curtain A is fixedly connected to both sides of the slider A, the other end of the folding curtain A is fixedly connected to the inner wall surface of the groove, the top and bottom of the folding curtain A are slidably connected to the inner wall surface of the groove, and a folding cover is fixedly connected to both sides of the support, the folding cover is arranged on the surface of the rodless cylinder A, and the other end of the folding cover is fixedly connected to the slider A.

[0029] Preferably, the fastener mechanism comprises a pressure plate, two of which are arranged front and back in the inner cavity of the housing, and the inner cavity of the housing is provided with a position adjustment component B for adjusting the position of the pressure plate;

[0030] Among them, the adjustment component B includes a support shell, and the support shell is fixedly connected to one on both sides of the inner cavity of the casing, and a support plate is fixedly connected to the middle part of the inner cavity of each support shell, and screws are rotatably connected on both sides of one of the support plates, and the surface threaded sleeve of the screw is provided with a screw sleeve, and guide rods are fixedly connected on both sides of the other support plate, and the surface sliding sleeve of the guide rod is provided with a sliding sleeve, and the sliding sleeve and the screw sleeve are arranged in a one-to-one correspondence, and a slide plate is fixedly connected to the sliding sleeve and the screw sleeve, and an electric telescopic rod B is vertically installed on the bottom of the slide plate, and the output end of the electric telescopic rod B is fixedly connected to the top of the corresponding pressure plate, and a motor fixedly connected to the screw is installed at the end of one of the support shells, and a baffle fixedly connected to the guide rod is installed at the end of the other support shell.

[0031] Preferably, a through groove A is provided on one side opposite to the two support shells, the slide plate is slidably connected to the inner cavity of the corresponding through groove A, and three folding curtains B are slidably connected to the inner cavity of the through groove A, the folding curtain B located in the middle is fixedly connected between the two corresponding slide plates, and the two ends of the folding curtains B located on both sides are fixedly connected to the corresponding slide plates and the inner wall surface of the through groove A.

[0032] Compared with the prior art, the advantages and positive effects of the present invention are:

[0033] 1. The present invention can realize unified suction and filtration of waste chips and harmful gases through the chip collection mechanism, which not only requires the preparation of an air purification device to reduce the use cost, but also can prevent waste chips from remaining on the hollow mesh plate to affect the subsequent workpiece cutting operation;

[0034] 2. The present invention, through the coordinated use of the cleaning mechanism and the displacement mechanism, can clean the surface of the activated carbon filter and the bottom surface of the inner cavity of the dust box, so that impurities such as waste chips can be uniformly concentrated in the collecting barrel. Subsequently, the collecting barrel only needs to be removed to clean the waste chips and other impurities in the collecting barrel, which not only helps to reduce the labor intensity, but also improves the waste chip cleaning efficiency. At the same time, the displacement mechanism drives the cleaning mechanism to clean the waste chips and other impurities in the same direction for uniform accumulation, avoiding the phenomenon of residual waste chips and other impurities caused by reciprocating cleaning, thereby helping to improve the waste chip cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 The structure of the fiber laser cutting machine according to the embodiment of the present invention is shown in FIG. Figure 1 ;

[0037] Figure 2 The structure of the fiber laser cutting machine according to the embodiment of the present invention is shown in FIG. Figure 2 ;

[0038] Figure 3 The structure of the fiber laser cutting machine according to the embodiment of the present invention is shown in FIG. Figure 3 ;

[0039] Figure 4 It is a schematic diagram of the partial structure of the optical fiber laser cutting machine according to an embodiment of the present invention;

[0040] Figure 5 It is a schematic structural diagram of a cutting mechanism of a fiber laser cutting machine according to an embodiment of the present invention;

[0041] Figure 6 It is a structural schematic diagram of the firmware mechanism of the optical fiber laser cutting machine according to an embodiment of the present invention;

[0042] Figure 7 It is a schematic structural diagram of a chip collection mechanism and a displacement mechanism of a fiber laser cutting machine according to an embodiment of the present invention;

[0043] Figure 8 It is a partial structural schematic diagram of a chip collection mechanism and a displacement mechanism of a fiber laser cutting machine according to an embodiment of the present invention;

[0044] Fig. 9 It is a schematic structural diagram of a chip collection mechanism, a cleaning mechanism and a displacement mechanism of a fiber laser cutting machine according to an embodiment of the present invention;

[0045] Fig.10 It is a schematic diagram of the structure explosion of the dust collection box, cleaning mechanism and displacement mechanism of the optical fiber laser cutting machine according to an embodiment of the present invention;

[0046] Fig.11 Fiber laser cutting machine according to the embodiment of the present invention Fig.10 A schematic diagram of the enlarged structure of point A;

[0047] Fig.12 It is a schematic diagram of the structure explosion of the cleaning mechanism of the optical fiber laser cutting machine according to an embodiment of the present invention;

[0048] Fig.13 It is a schematic diagram of the partial structure explosion of the cleaning mechanism of the optical fiber laser cutting machine according to an embodiment of the present invention;

[0049] Fig.14 The fiber laser cutting machine of the embodiment of the present invention Fig.12 Schematic diagram of the enlarged structure of point B.

[0050] In the figure: 100, main body; 110, housing; 111, cavity; 112, air inlet; 113, dust screen; 114, inspection door; 115, groove; 120, shield; 130, leg; 140, hollow mesh plate;

[0051] 200, cutting mechanism; 210, fiber laser cutter; 220, positioning assembly A; 221, electric telescopic rod A; 222, rodless cylinder A; 223, support; 224, rodless cylinder B; 225, slider A; 226, folding curtain A; 227, folding cover;

[0052] 300, fastener mechanism; 310, pressing plate; 320, adjustment assembly B; 321, support shell; 3211, baffle plate; 3212, through slot A; 3213, folding curtain B; 322, support plate; 323, screw rod; 324, screw sleeve; 325, guide rod; 326, sliding sleeve; 327, slide plate; 328, electric telescopic rod B; 329, motor;

[0053] 400, dust collecting mechanism; 410, hopper; 420, dust collecting box; 421, discharge pipe; 422, slot; 423, box door; 424, through slot B; 425, frame; 426, folding curtain C; 427, folding curtain D; 430, air duct; 440, exhaust fan; 450, activated carbon filter; 460, collecting barrel;

[0054] 500, cleaning mechanism; 510, supporting assembly; 511, support plate A; 5111, limiting groove; 512, support plate B; 513, L-shaped frame; 514, diagonal support; 520, brush; 530, rubber scraper; 540, connecting assembly; 541, slider B; 542, bracket; 543, rectangular rod; 544, collar; 545, positioning column; 546, positioning groove; 550, limiting strip;

[0055] 600, displacement mechanism; 610, support plate; 620, electric telescopic rod C; 630, rodless cylinder C. DETAILED DESCRIPTION

[0056] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0057] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0058] Example 1

[0059] like Figure 1-Figure 14 As shown, a fiber laser cutting machine according to an embodiment of the present invention includes a main body mechanism 100, in which a cutting mechanism 200, a fixing mechanism 300, a chip collecting mechanism 400, a cleaning mechanism 500 and a displacement mechanism 600 are arranged. The cutting mechanism 200, the fixing mechanism 300 and the chip collecting mechanism 400 are arranged sequentially from top to bottom, the cleaning mechanism 500 is arranged inside the chip collecting mechanism 400, and the displacement mechanism 600 is arranged on one side of the chip collecting mechanism 400;

[0060] The main body mechanism 100 is used to provide an installation basis for the cutting mechanism 200, the fixing mechanism 300, the chip collecting mechanism 400, the cleaning mechanism 500 and the displacement mechanism 600;

[0061] The cutting mechanism 200 is used to cut the workpiece;

[0062] The fixing mechanism 300 is used to press and fix the workpiece;

[0063] The chip collecting mechanism 400 is used to suck and filter the waste chips and harmful gases generated by the cutting mechanism 200;

[0064] The cleaning mechanism 500 is used to clean up the waste chips accumulated inside the chip collecting mechanism 400;

[0065] The displacement mechanism 600 is used to drive the cleaning mechanism 500 to move so as to expand the cleaning range.

[0066] Example 2

[0067] like Figure 1-Figure 14 As shown, the fiber laser cutting machine provided in this embodiment is different from that in Embodiment 1 in that:

[0068] The main mechanism 100 includes a casing 110, to which a baffle 120 is hinged, and legs 130 for support are installed at the four corners of the bottom of the casing 110. The inner cavity of the casing 110 is provided with a hollow mesh plate 140 for carrying the workpiece, and the cutting mechanism 200 and the fixing mechanism 300 are both arranged above the hollow mesh plate 140. The chip collection mechanism 400, the cleaning mechanism 500 and the displacement mechanism 600 are all arranged below the hollow mesh plate 140. The casing 110 and the baffle 120 make the workpiece in a relatively sealed environment during processing, which can improve the safety of the workpiece cutting process. A cavity 111 is opened at the bottom of the inner cavity of the casing 110, and the hollow mesh plate 140 is installed in the inner cavity of the cavity 111.

[0069] The cutting mechanism 200 includes a fiber laser cutter 210 located in the inner cavity of the housing 110, and a position adjustment component A220 for adjusting the position of the fiber laser cutter 210 is provided between the fiber laser cutter 210 and the housing 110;

[0070] The positioning assembly A220 includes a vertically arranged electric telescopic rod A221, the optical fiber laser cutter 210 is installed at the output end of the electric telescopic rod A221, a rodless cylinder A222 is horizontally arranged on the rear side of the electric telescopic rod A221, a support 223 is fixedly connected to the slide of the rodless cylinder A222, the electric telescopic rod A221 is installed on one side of the support 223, a groove 115 is provided on both sides of the inner cavity of the housing 110, a horizontally arranged rodless cylinder B224 is installed in the inner cavity of each groove 115, and a slider is fixedly connected to the slide of each rodless cylinder B224 A225, the rodless cylinder A222 is installed between the two sliders A225. By starting the electric telescopic rod A221, the fiber laser cutter 210 can be driven to move along the Y-axis direction; by starting the rodless cylinder A222, the support 223, the electric telescopic rod A221 and the fiber laser cutter 210 can be driven to move along the Z-axis direction; by starting the rodless cylinder B224, the slider A225, the rodless cylinder A222, the support 223, the electric telescopic rod A221 and the fiber laser cutter 210 can be driven to move along the X-axis direction, thereby increasing the cutting range of the fiber laser cutter 210;

[0071] Folding curtains A226 are fixedly connected to both sides of the slider A225, and the other end of the folding curtain A226 is fixedly connected to the inner wall of the groove 115. The top and bottom of the folding curtain A226 are slidably connected to the inner wall of the groove 115. Folding covers 227 are fixedly connected to both sides of the support 223. The folding cover 227 is arranged on the surface of the rodless cylinder A222, and the other end of the folding cover 227 is fixedly connected to the slider A225. By using the folding curtain A226 and the folding cover 227 in coordination, it is possible to effectively prevent impurities such as waste chips generated by the fiber laser cutter 210 during cutting from adhering to the rodless cylinder A222 and the rodless cylinder B224, so as to ensure the normal operation of the rodless cylinder A222 and the rodless cylinder B224.

[0072] The fastener mechanism 300 includes a pressing plate 310. Two pressing plates 310 are arranged in the inner cavity of the housing 110 in a front-to-back manner. A rubber pad is glued to the bottom of the pressing plate 310, which not only helps to improve the friction between the pressing plate 310 and the workpiece, plays an anti-slip role, effectively improves the fixation stability of the workpiece, but also can prevent the pressing plate 310 from directly contacting the workpiece and causing wear on the workpiece surface. The inner cavity of the housing 110 is provided with a positioning component B320 for adjusting the position of the pressing plate 310;

[0073] The positioning assembly B320 includes a support shell 321, and the support shell 321 is fixedly connected to one on each side of the inner cavity of the casing 110. The support shell 321 is located below the groove 115 and is arranged parallel to the groove 115. A support plate 322 is fixedly connected to the middle of the inner cavity of each support shell 321. The two sides of one support plate 322 are respectively rotatably connected to a horizontally arranged screw rod 323 through a bearing, and the surface thread sleeve of the screw rod 323 is provided with a screw sleeve 324. The two sides of the other support plate 322 are respectively fixedly connected to a guide rod 325 arranged parallel to the screw rod 323, and the surface sliding sleeve of the guide rod 325 is provided with a sliding sleeve 326. The sliding sleeve 326 and the screw sleeve 324 are arranged one by one. The sliding sleeve 326 A slide plate 327 is fixedly connected to the screw sleeve 324, and an electric telescopic rod B328 is vertically installed on the bottom of the slide plate 327. The output end of the electric telescopic rod B328 is fixedly connected to the top of the corresponding pressing plate 310. A motor 329 fixedly connected to the screw rod 323 is installed at the end of one of the support shells 321. By starting the electric telescopic rod B328, the pressing plate 310 can be driven to move along the Y-axis direction to be suitable for workpieces of different thicknesses; by starting the motor 329, the screw rod 323 can be driven to rotate, and then the pressing plate 310 can be driven to move along the Z-axis direction to be suitable for workpieces of different sizes. A baffle 3211 fixedly connected to the guide rod 325 is installed at the end of the other support shell 321;

[0074] A through groove A3212 is provided on the opposite side of the two support shells 321, and the slide plate 327 is slidably connected to the inner cavity of the corresponding through groove A3212. The inner cavity of the through groove A3212 is slidably connected with three folding curtains B3213. The folding curtain B3213 located in the middle is fixedly connected between the two corresponding slide plates 327, and the two ends of the folding curtains B3213 located on both sides are fixedly connected to the corresponding slide plates 327 and the inner wall surface of the through groove A3212. The through groove A3212 can provide a moving space for the slide plate 327. The folding curtains B3213 can prevent impurities such as waste chips generated during cutting from entering the inner cavity of the support shell 321, so as to ensure the normal operation of the adjustment component B320.

[0075] The chip collecting mechanism 400 includes a hopper 410, two hoppers 410 are symmetrically installed in the inner cavity of the cavity 111, the bottoms of the two hoppers 410 are commonly connected to a horizontally arranged dust box 420, the rear side of the dust box 420 is connected to two symmetrically arranged air ducts 430, one end of the air duct 430 away from the dust box 420 is connected to an exhaust fan 440, the exhaust fan 440 is installed on the housing 110, an activated carbon filter 450 is detachably installed in the inner cavity of the dust box 420, an air inlet 112 is opened at the upper part of the rear side of the housing 110, a dust screen 113 is installed in the inner cavity of the air inlet 112, and the air inlet 112 is provided with a dust shield 113. 2. A gas flow channel is formed between the housing 110, the hopper 410, the dust box 420, the air duct 430 and the exhaust fan 440. By starting the exhaust fan 440, the waste on the hollow mesh plate 140 and the harmful gas in the inner cavity of the housing 110 can be uniformly sucked into the inner cavity of the dust box 420 and filtered by the activated carbon filter 450. A discharge pipe 421 is connected to one side of the bottom of the dust box 420. A collecting barrel 460 is threadedly sleeved on the surface of the discharge pipe 421. The bottom of the collecting barrel 460 penetrates to the bottom of the housing 110. The waste and other impurities accumulated in the dust box 420 can be discharged through the discharge pipe 421. Waste scraps and other impurities can be collected by the collecting barrel 460, and the displacement mechanism 600 is arranged on the side of the dust box 420 away from the air duct 430; the activated carbon filter 450 is arranged obliquely in the inner cavity of the dust box 420, and the side and bottom surfaces of the inner wall of the dust box 420 are provided with a card slot 422, and the top and bottom of the activated carbon filter 450 are respectively stuck in the corresponding card slot 422. By setting the activated carbon filter 450 obliquely, the waste scraps and other impurities on the activated carbon filter 450 can fall to the bottom of the inner cavity of the dust box 420 due to their own gravity, thereby avoiding a large amount of waste scraps and other impurities from accumulating on the activated carbon filter 450; The activated carbon filter 450 is detachably connected to the dust box 420 through the card slot 422, so that the activated carbon filter 450 can be removed from the dust box 420 for maintenance or replacement on a regular basis. One end of the dust box 420 is open, and a box door 423 is hinged on the dust box 420 to seal and block the open part. One side of the box door 423 is in contact with the activated carbon filter 450. The lower part of one side of the surface of the housing 110 is hinged with an inspection door 114 arranged opposite to the box door 423. The inspection door 114 cooperates with the box door 423 to facilitate the subsequent disassembly and assembly of the activated carbon filter 450.Both sides of the frame 425 are fixedly connected with folding curtains C426, the other end of which is fixedly connected to the inner wall of the through slot B424, the top and bottom of which are slidably connected to the inner wall of the through slot B424, and the top and bottom of the connecting assembly 540 are provided with folding curtains D427, the other end of which is fixedly connected to the inner wall of the frame 425, and both sides of which are slidably connected to the inner wall of the frame 425. The coordinated use of the folding curtains C426 and D427 can prevent waste and harmful gases from leaking through the through slot B424. ;

[0076] The cleaning mechanism 500 includes a support assembly 510, which is arranged in the inner cavity of the dust box 420. A brush 520 is provided on the side of the support assembly 510 facing the activated carbon filter 450, and a rubber scraper 530 is provided on the side of the support assembly 510 facing the bottom of the inner cavity of the dust box 420. A connecting assembly 540 is provided on the support assembly 510. A through groove B424 for the connection assembly 540 to move is provided on the side of the dust box 420 away from the air duct 430. The inner cavity of the through groove B424 is slidably connected with a frame 425 for guiding the connection assembly 540. The through groove B424 can provide a movable space for the connection assembly 540. The through groove B424 and the frame 425 can be used in combination to guide the connection assembly 540, so that the connection assembly 540 can move stably horizontally or vertically. The support assembly 510 is connected to the displacement mechanism 600 through the connecting assembly 540.

[0077] The support assembly 510 includes a support plate A511, which is arranged in parallel with the activated carbon filter 450. The bottom end of the support plate A511 is integrally formed with a horizontally arranged support plate B512. The angle formed between the support plate A511 and the support plate B512 is greater than ninety degrees. The support plate A511 and the support plate B512 are fixedly connected to an L-shaped frame 513. The corner of the L-shaped frame 513 is fixedly connected with an oblique support 514. The other end of the oblique support 514 is fixedly connected to the angle between the support plate A511 and the support plate B512. The stability of the support of the L-shaped frame 513 can be improved by the oblique support 514. The brush 520 is detachably connected to one side of the support plate A511 and contacts the surface of the activated carbon filter 450. The rubber scraper 530 is detachably connected to the bottom of the support plate B512 and contacts the bottom surface of the inner cavity of the dust box 420.

[0078] The connecting assembly 540 includes a slider B541 slidably connected to the inner cavity of the frame 425, the top and bottom of the slider B541 are fixedly connected to the corresponding folding curtain D427 respectively, the side of the slider B541 away from the inner cavity of the dust box 420 is fixedly connected to a bracket 542, the bracket 542 is arranged on one side of the displacement mechanism 600, and a rectangular rod 543 is movably penetrated on the slider B541, so that the support assembly 510, the brush 520 and the rubber scraper 530 can rotate around the rectangular rod 543 as the axis, so that the brush 520 and the rubber scraper 530 can be rotated out of the inner cavity of the dust box 420 for disassembly and assembly later, and the surface of the rectangular rod 543 is rotatably connected to the penetration of the slider B541 through a bearing to ensure that the rectangular rod 543 is in the slider B5 41, one end of the rectangular rod 543 is fixedly connected to the L-shaped frame 513, the surface of the rectangular rod 543 is slidably sleeved with a collar 544, the side of the collar 544 close to the slider B541 is fixedly connected with a positioning column 545, the surface of the slider B541 is provided with a positioning groove 546 adapted to the positioning column 545, the positioning column 545 is inserted into the inner cavity of the corresponding positioning groove 546, the end of the positioning column 545 is fixedly connected with a magnet, the inner cavity of the positioning groove 546 is fixedly connected with an iron block, the magnet is adsorbed on one side of the corresponding iron block, the magnet and the iron block are used in combination, the positioning column 545 can be fixed, which helps to improve the stability of the positioning column 545 inserted into the positioning groove 546 and prevent it from loosening;

[0079] The brush 520 and the rubber scraper 530 are both fixedly connected with the limit strip 550, and the support plate A511 and the support plate B512 are both provided with a limit groove 5111 adapted to the limit strip 550, and the limit strip 550 is inserted into the inner cavity of the corresponding limit groove 5111. Through the cooperation of the limit strip 550 and the limit groove 5111, the brush 520 and the support plate A511, and the rubber scraper 530 and the support plate B512 can be detachably connected, so that the brush 520 and the rubber scraper 530 can be detachably connected in the future. Regular maintenance or replacement is carried out, and the diameter of the cross-section of the limit strip 550 is larger than the opening size of the cross-section of the limit groove 5111, which effectively prevents the limit strip 550 from slipping out of the inner cavity of the limit groove 5111 in the vertical direction; the opposite ends of the two limit strips 550 are in contact, and the other end of one of the limit strips 550 is in contact with the inner wall surface of the dust box 420, and the dust box 420 can further limit the limit strip 550, effectively preventing it from escaping from the inner cavity of the limit groove 5111 in the horizontal or inclined direction.

[0080] The displacement mechanism 600 includes a support plate 610, which is horizontally fixedly connected to the side of the dust box 420 away from the air duct 430, and the support plate 610 is located below the through slot B424. Both sides of the top of the support plate 610 are vertically installed with an electric telescopic rod C620. The output ends of the two electric telescopic rods C620 are jointly installed with a horizontally arranged rodless cylinder C630. The bracket 542 is fixedly connected to the slide of the electric telescopic rod C620. By starting the electric telescopic rod C 620 can drive the rodless cylinder C630, the connecting assembly 540, the supporting assembly 510, the brush 520, the rubber scraper 530 and the limiting bar 550 to move along the Y-axis direction in the dust box 420; starting the rodless cylinder C630 can drive the connecting assembly 540, the supporting assembly 510, the brush 520, the rubber scraper 530 and the limiting bar 550 to move along the X-axis direction in the dust box 420, thereby facilitating the improvement of the cleaning range of the brush 520 and the rubber scraper 530.

[0081] Working principle:

[0082] Placing the workpiece: open the baffle 120, place the workpiece on the hollow mesh plate 140, and then close the baffle 120; start the motor 329, so that the output shaft of the motor 329 drives the screw 323 to rotate, and the screw 323 drives the screw sleeve 324 on its surface to move along the Z-axis direction, and the screw sleeve 324 drives the corresponding slide plate 327, the electric telescopic rod B328, the pressure plate 310 and the sliding sleeve 326 to move synchronously, and the sliding sleeve 326 slides on the surface of the guide rod 325, and the folding curtain B3213 is stretched or contracted by force until the two pressure plates 310 are both located above the workpiece; start the electric telescopic rod B328, and the output end of the electric telescopic rod B328 drives the corresponding pressure plate 310 to move downward until the rubber pad at the bottom of the pressure plate 310 contacts the top of the workpiece, and the workpiece can be fixed;

[0083] Cutting workpieces: Start the electric telescopic rod A221 to drive the fiber laser cutter 210 to move along the Y-axis direction; start the rodless cylinder A222, and the slide of the rodless cylinder A222 drives the support 223, the electric telescopic rod A221 and the fiber laser cutter 210 to move along the X-axis direction; start the rodless cylinder B224, and the slide of the rodless cylinder B224 drives the slider A225, the rodless cylinder A222, the support 223, the electric telescopic rod A221 and the fiber laser cutter 210 to move along the Z-axis direction, and the folding curtain A226 and the folding cover 227 are stretched or contracted by force, so that the position of the fiber laser cutter 210 can be adjusted; start the fiber laser cutter 210 to cut the workpiece;

[0084] Suction of waste chips and harmful gases: Start the exhaust fan 440, and the exhaust fan 440 sucks the waste chips and harmful gases generated by the fiber laser cutter 210 in the housing 110 into the inner cavity of the dust box 420 through the hollow mesh plate 140 and the hopper 410 in turn, and then passes through the activated carbon filter 450 for filtering and exhausts the gases through the air duct 430 and the exhaust fan 440, and the waste chips and other impurities remain at the bottom of the inner cavity of the dust box 420 and the surface of the activated carbon filter 450;

[0085] Cleaning up waste debris: Start the rodless cylinder C630, the slide of the rodless cylinder C630 drives the connecting assembly 540, the supporting assembly 510, the brush 520, the rubber scraper 530 and the limit bar 550 to move along the X-axis direction, and the connecting assembly 540 drives the frame 425 to slide in the inner cavity of the through groove B424, and the folding curtain C426 is stretched or contracted by force, so that the surface of the activated carbon filter 450 can be cleaned by the brush 520, and the bottom of the inner cavity of the dust box 420 can be cleaned by the rubber scraper 530. The scraping operation causes the waste and other impurities on the activated carbon filter 450 to fall to the bottom of the inner cavity of the dust box 420, and the waste and other impurities at the bottom of the inner cavity of the dust box 420 are pushed to the discharge pipe 421, and fall into the collecting barrel 460 through the discharge pipe 421 for unified collection; the electric telescopic rod C620 is started, and the output end of the electric telescopic rod C620 drives the rodless cylinder C630, the connecting assembly 540, the supporting assembly 510, the brush 520, the rubber scraper 530 and the limit bar 550 along the Y-axis direction Move upward, and the connecting component 540 slides synchronously in the inner cavity of the frame 425, and the folding curtain D427 is stretched or contracted by force, so that the brush 520 is separated from the surface of the activated carbon filter 450 and the rubber scraper 530 is separated from the bottom surface of the inner cavity of the dust box 420; in order to improve the cleaning effect of the cleaning mechanism 500, the rodless cylinder C630 is started again, so that the rodless cylinder C630 drives the cleaning mechanism 500 to move along the X-axis to the end of the inner cavity of the dust box 420 away from the discharge pipe 421; the electric telescopic rod is started again C620, so that the electric telescopic rod C620 drives the cleaning mechanism 500 to move downward along the Y-axis direction to the maximum limit; then the rodless cylinder C630 is started, so that the rodless cylinder C630 drives the cleaning mechanism 500 to move along the X-axis to the end of the inner cavity of the dust box 420 close to the discharge pipe 421, so that the surface of the activated carbon filter 450 and the bottom surface of the inner cavity of the dust box 420 can be fully cleaned; finally, the collecting barrel 460 is rotated to remove it, and the waste scraps and other impurities in the collecting barrel 460 can be cleaned;

[0086] Maintenance or replacement: open the inspection door 114 and the box door 423 in sequence, pull out the activated carbon filter 450, and make the activated carbon filter 450 slide in the inner cavity of the slot 422 until it is out of the inner cavity of the dust box 420, and the disassembly operation of the activated carbon filter 450 can be completed. At this time, the activated carbon filter 450 can be maintained or replaced; start the rodless cylinder C630, so that the rodless cylinder C630 drives the cleaning mechanism 500 to move along the X-axis to the end of the inner cavity of the dust box 420 close to the discharge pipe 421, and turn the ring 544, and the ring 544 drives the positioning column 545 and the magnet to move synchronously until the magnet is out of the inner cavity of the positioning slot 546. At this time, rotate the support assembly 510 so that the support assembly Component 510 drives the brush 520, rubber scraper 530, limit strip 550, rectangular rod 543, collar 544 and positioning column 545 to rotate synchronously with the rectangular rod 543 as the axis until the brush 520 and the rubber scraper 530 rotate out of the inner cavity of the dust box 420; first pull and move the rubber scraper 530 so that the rubber scraper 530 drives the limit strip 550 thereon to slide out of the inner cavity of the corresponding limit groove 5111, and then pull and move the brush 520 so that the brush 520 drives the limit strip 550 thereon to slide out of the inner cavity of the corresponding limit groove 5111, and the disassembly operation of the brush 520 and the rubber scraper 530 can be completed, and the brush 520 and the rubber scraper 530 can be maintained or replaced at this time.

[0087] Through the above specific implementations, those skilled in the art can easily implement the present invention. However, it should be understood that the present invention is not limited to the above specific implementations. On the basis of the disclosed implementations, those skilled in the art can arbitrarily combine different technical features to achieve different technical solutions.

Claims

1. A fiber laser cutting machine, characterized in that: The main body (100) comprises a cutting mechanism (200), a fixing mechanism (300), a chip collecting mechanism (400), a cleaning mechanism (500) and a displacement mechanism (600) arranged inside the main body, wherein the cutting mechanism (200), the fixing mechanism (300) and the chip collecting mechanism (400) are arranged in sequence from top to bottom, the cleaning mechanism (500) is arranged inside the chip collecting mechanism (400), and the displacement mechanism (600) is arranged on one side of the chip collecting mechanism (400); The main body mechanism (100) is used to provide an installation foundation for the cutting mechanism (200), the fixing mechanism (300), the chip collecting mechanism (400), the cleaning mechanism (500) and the displacement mechanism (600); The cutting mechanism (200) is used to perform cutting processing on a workpiece; The fixing mechanism (300) is used to press and fix the workpiece; The chip collecting mechanism (400) is used to suck and filter waste chips and harmful gases generated by cutting by the cutting mechanism (200); The cleaning mechanism (500) is used to sweep away and clean the waste chips accumulated inside the chip collecting mechanism (400); The displacement mechanism (600) is used to drive the cleaning mechanism (500) to move so as to expand the cleaning range.

2. The optical fiber laser cutting machine according to claim 1, characterized in that: The main body mechanism (100) comprises a casing (110), a baffle (120) is hingedly connected to the casing (110), four corners of the bottom of the casing (110) are provided with supporting legs (130), the inner cavity of the casing (110) is provided with a hollow mesh plate (140) for carrying a workpiece, the cutting mechanism (200) and the fixing mechanism (300) are both arranged above the hollow mesh plate (140), the chip collecting mechanism (400), the cleaning mechanism (500) and the displacement mechanism (600) are all arranged below the hollow mesh plate (140), a cavity (111) is opened at the bottom of the inner cavity of the casing (110), and the hollow mesh plate (140) is installed in the inner cavity of the cavity (111); The chip collection mechanism (400) comprises a hopper (410), two of which are symmetrically installed in the inner cavity of the cavity (111), the bottoms of the two hoppers (410) are connected to a dust box (420), the rear side of the dust box (420) is connected to an air duct (430), the end of the air duct (430) away from the dust box (420) is connected to an exhaust fan (440), the exhaust fan (440) is installed through the housing (110), the inner cavity of the dust box (420) is detachably installed with an activated carbon filter (450), and the upper part of the rear side of the housing (110) is provided with a An air inlet (112), the inner cavity of which is provided with a dust screen (113), a gas flow passage is formed between the air inlet (112), the housing (110), the hopper (410), the dust collecting box (420), the air duct (430) and the exhaust fan (440), one side of the bottom of the dust collecting box (420) is connected with a discharge pipe (421), a surface of the discharge pipe (421) is threadedly sleeved with a collecting barrel (460), the bottom of the collecting barrel (460) passes through the bottom of the housing (110), and the displacement mechanism (600) is arranged on a side of the dust collecting box (420) away from the air duct (430); The cleaning mechanism (500) comprises a support assembly (510), the support assembly (510) being arranged in the inner cavity of the dust box (420), a brush (520) being arranged on the side of the support assembly (510) facing the activated carbon filter (450), a rubber scraper (530) being arranged on the side of the support assembly (510) facing the bottom of the inner cavity of the dust box (420), a connecting assembly (540) being arranged on the support assembly (510), a through slot B (424) for the connecting assembly (540) to move being arranged on the side of the dust box (420) away from the air duct (430), the inner cavity of the through slot B (424) being slidably connected to a frame (425) for guiding the connecting assembly (540), and the support assembly (510) being connected to the displacement mechanism (600) via the connecting assembly (540); The support assembly (510) comprises a support plate A (511), the support plate A (511) is arranged in parallel with the activated carbon filter (450), the bottom end of the support plate A (511) is integrally formed with a support plate B (512) arranged horizontally, the support plate A (511) and the support plate B (512) are fixedly connected to an L-shaped frame (513), the brush (520) is detachably connected to one side of the support plate A (511) and contacts the surface of the activated carbon filter (450), and the rubber scraper (530) is detachably connected to the bottom of the support plate B (512) and contacts the bottom surface of the inner cavity of the dust collecting box (420); The connecting assembly (540) comprises a slider B (541) slidably connected to the inner cavity of the frame (425); a side of the slider B (541) away from the inner cavity of the dust collecting box (420) is fixedly connected to a bracket (542); the bracket (542) is arranged on one side of the displacement mechanism (600); a rectangular rod (543) is movably penetrated on the slider B (541); one end of the rectangular rod (543) is fixedly connected to the L-shaped frame (513); and a sliding sleeve is arranged on the surface of the rectangular rod (543). A collar (544) is provided, and a positioning column (545) is fixedly connected to one side of the collar (544) close to the slider B (541). A positioning groove (546) matching the positioning column (545) is provided on the surface of the slider B (541). The positioning column (545) is inserted into the inner cavity of the corresponding positioning groove (546). A magnet is fixedly connected to the end of the positioning column (545). An iron block is fixedly connected to the inner cavity of the positioning groove (546). The magnet is adsorbed on one side of the corresponding iron block. The brush (520) and the rubber scraper (530) are both fixedly connected with a limiting strip (550); the support plate A (511) and the support plate B (512) are both provided with limiting grooves (5111) adapted to the limiting strip (550); the limiting strip (550) is inserted into the inner cavity of the corresponding limiting groove (5111); and the diameter of the cross section of the limiting strip (550) is greater than the opening size of the cross section of the limiting groove (5111); The displacement mechanism (600) comprises a support plate (610), the support plate (610) being fixedly connected to a side of the dust box (420) away from the air duct (430), and the support plate (610) being located below the through slot B (424), an electric telescopic rod C (620) being installed on both sides of the top of the support plate (610), and a horizontally arranged rodless cylinder C (630) being installed at the output ends of the two electric telescopic rods C (620), and the bracket (542) being fixedly connected to the slide table of the electric telescopic rod C (620).

3. The optical fiber laser cutting machine according to claim 2, characterized in that: The activated carbon filter (450) is arranged obliquely in the inner cavity of the dust box (420), and a slot (422) is provided on the side and bottom of the inner wall of the dust box (420), and the top and bottom of the activated carbon filter (450) are respectively locked in the corresponding slots (422).

4. The optical fiber laser cutting machine according to claim 3, characterized in that: One end of the dust box (420) is arranged in an open shape, and a box door (423) capable of sealing and shielding the open portion is hingedly connected to the dust box (420), one side of the box door (423) is in contact with the activated carbon filter (450), and an inspection door (114) arranged opposite to the box door (423) is hingedly connected to the lower part of one side of the surface of the housing (110).

5. The optical fiber laser cutting machine according to claim 4, characterized in that: Both sides of the frame (425) are fixedly connected with folding curtains C (426), the other end of the folding curtain C (426) is fixedly connected to the inner wall surface of the through groove B (424), the top and bottom of the folding curtain C (426) are slidably connected to the inner wall surface of the through groove B (424), the top and bottom of the slider B (541) are fixedly connected with folding curtains D (427), the other end of the folding curtain D (427) is fixedly connected to the inner wall surface of the frame (425), and both sides of the folding curtain D (427) are slidably connected to the inner wall surface of the frame (425).

6. The optical fiber laser cutting machine according to claim 5, characterized in that: The opposite ends of the two limiting strips (550) are in contact, and the other end of one of the limiting strips (550) is in contact with the inner wall surface of the dust collecting box (420).

7. The optical fiber laser cutting machine according to claim 6, characterized in that: The cutting mechanism (200) comprises a fiber laser cutter (210) located in the inner cavity of the housing (110), and a position adjustment component A (220) for adjusting the position of the fiber laser cutter (210) is provided between the fiber laser cutter (210) and the housing (110); The positioning assembly A (220) comprises an electric telescopic rod A (221), the optical fiber laser cutter (210) is installed at the output end of the electric telescopic rod A (221), a rodless cylinder A (222) is provided at the rear side of the electric telescopic rod A (221), a support (223) is fixedly connected to the slide table of the rodless cylinder A (222), the electric telescopic rod A (221) is installed on one side of the support (223), a groove (115) is provided on both sides of the inner cavity of the housing (110), a rodless cylinder B (224) is installed in the inner cavity of each groove (115), a slider A (225) is fixedly connected to the slide table of each rodless cylinder B (224), and the rodless cylinder A (222) is installed between two sliders A (225).

8. The optical fiber laser cutting machine according to claim 7, characterized in that: Both sides of the slider A (225) are fixedly connected with a folding curtain A (226), the other end of the folding curtain A (226) is fixedly connected to the inner wall surface of the groove (115), the top and bottom of the folding curtain A (226) are slidably connected to the inner wall surface of the groove (115), and both sides of the support (223) are fixedly connected with a folding cover (227), the folding cover (227) is arranged on the surface of the rodless cylinder A (222), and the other end of the folding cover (227) is fixedly connected to the slider A (225).

9. The optical fiber laser cutting machine according to claim 8, characterized in that: The fastener mechanism (300) comprises a pressing plate (310), wherein two pressing plates (310) are arranged front and back in the inner cavity of the housing (110), and the inner cavity of the housing (110) is provided with a position adjustment component B (320) for adjusting the position of the pressing plate (310); The positioning assembly B (320) comprises a support shell (321), one of the support shells (321) being fixedly connected to both sides of the inner cavity of the housing (110), a support plate (322) being fixedly connected to the middle of the inner cavity of each support shell (321), a screw rod (323) being rotatably connected to both sides of one of the support plates (322), a threaded sleeve (324) being provided on the surface of the screw rod (323), a guide rod (325) being fixedly connected to both sides of the other support plate (322), a sliding sleeve (326) being provided on the surface of the guide rod (325), and the The sliding sleeve (326) and the screw sleeve (324) are arranged in a one-to-one correspondence, and a slide plate (327) is fixedly connected to each of the sliding sleeve (326) and the screw sleeve (324). An electric telescopic rod B (328) is vertically installed at the bottom of the slide plate (327), and the output end of the electric telescopic rod B (328) is fixedly connected to the top of the corresponding pressing plate (310). A motor (329) fixedly connected to the screw rod (323) is installed at the end of one of the support shells (321), and a baffle (3211) fixedly connected to the guide rod (325) is installed at the end of the other support shell (321).

10. The optical fiber laser cutting machine according to claim 9, characterized in that: A through slot A (3212) is provided on one side opposite to the two support shells (321), the slide plate (327) is slidably connected to the inner cavity of the corresponding through slot A (3212), and the inner cavity of the through slot A (3212) is slidably connected to three folding curtains B (3213), the folding curtain B (3213) located in the middle is fixedly connected between the two corresponding slide plates (327), and the two ends of the folding curtains B (3213) located on both sides are fixedly connected to the corresponding slide plates (327) and the inner wall surface of the through slot A (3212).

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